A glass has a natural resonance, a frequency at which the glass will vibrate easily. Therefore the glass needs to be moved by the sound wave at that frequency. If the force from the sound wave making the glass vibrate is big enough, the size of the vibration will become so large that the glass breaks.

Glass Breaking Sounds app Features:
☆ All Sounds are high quality sounds
☆ App can work in the background
☆ Auto-play sounds mode available
☆ App works offline after download.
☆ Free App

With this app you'll find glass breaking sounds that match many fragile household items. From windows and mirrors to fine china dishes and decorative artwork. Hear cracks and shatters of different tones and types! Adults, kids and babies alike will be fascinated by these strange, loud noises!
Glass Breaking Sounds is a collection of the best sounds that these beautiful and intelligent sources produce